In 2077, the out-of-control "Sky Dome Project" triggered an "entropy tide". Nanorobots crazily devoured matter and transformed into aberrant zombies called "entropy-eating bodies." Civilization collapsed and the world became a wasteland shrouded in scarlet mist. While searching for supplies, Ling Radon accidentally activated a silver bracelet that appeared inexplicably on his wrist and discovered that it actually contained the "Code Zero" that could reverse the tide of entropy. At the same time, the "Key Holder" organization composed of old-era technology oligarchs, the underground faction "The Metamorphosis Society" that masters biomodification technology, and the "Gear Holy See", a mechanical cult formed in the ruins, all focused on him. Ling Radon must piece together the truth of his memories and decipher the secrets of the code amidst the hunt for entropy-devouring bodies and the pursuit of all forces. He gradually discovers that behind the tide of entropy is not only a technological disaster, but also a cruel choice about the direction of human evolution. The entropy factor in his body is the key to unlocking the shackles of doom.
